On the Functions of the Medulla Oblongata and Medulla Spinalis, and on the Excito-motory System of Nerves

Marshall Hall's paper, "On the Functions of the Medulla Oblongata and Medulla Spinalis, and on the Excito-motory System of Nerves" (1837), scientifically explained reflex action. Hall proposed that the spinal cord is composed of independent units, each functioning as a reflex arc. These arcs, formed by sensory and motor nerves and spinal cord segments, interact with each other and the brain for coordinated movement. Hall's research, initially met with skepticism, laid the groundwork for understanding how the medulla oblongata, the lowest part of the brainstem, controls vital autonomic functions like heartbeat and respiration, and transmits signals between the spinal cord and higher brain regions.12